Single well cylinder.



A. L. LIGON. S-INGLE WELL CYLINDER. APPLICATION FILED 1120.2. 191s.

Patented Dec. 15, 1914.

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ARTHUR LEE Licion,` or `nono, TEXAS.

SINGLE WELL CYLINDER.

Application fired December a, 1913.- serial No. 804,227.

To all whom t may `concern Be it known that I, ARTHUR LEE LrGoN, a citizen of the United States of America, residing at Lobo, in the county of El Paso and State of Texas, have invented certain new and useful Tmprovements in Single l/Vell Cylinders, of which the following is a specification, reference being had therein to the accompanying drawing.

This invention relates to an improved single well cylinder pump, and the principal object of the invention is to provide an improved pump which is soconstructed that it may be very e'liiciently operated in a deep i well, and which is so constructed that the cylinder may be readily removed when desired. f

Another object of the invention is to provide the piston with an improved head so constructed that the oil may be forced past the head on the'down stroke and then carried up the well tube upon the return stroke.

Another object of the invention isv to provide the inner cylinder with` a choke plug at its lower end provided with a valve so that when the plug is in place the oil which is sucked into the cylinder past the valve of the plug will be prevented from flowing back into the well.

With the above and other objects in view` this invention consists of certain novel combinations, constructions and arrangements of parts as will be hereinafter fully described and claimed. l

In the accompanying drawing Figure 1 isa sectional view through the pump. Fig. 2 is a sectional view through'the outer cylinder of the pump. Fig. 3 is asectionftaken along the line .3#3, of Fig. 1. Fig.' 4 is a section taken along the line 1 -4, of Fig; 1. Fig. 5 is a section taken along the line 5 5, of Fig. 1. n y

ln the accompanying rdrawings the numeral indicates the lower end portion of the well tube. This tube 10 is connected with the outer cylinder 11 of the pump by means of a coupling 12 `which is threaded upon the tube and outer cylinder and is provided with internal teeth 13 so that the inner cylinder can be removably connected with the outer cylinder. A. tapered collar 14- connects the outer cylinder 11 with the lower pipe 15 of the well tube. This collar 14 is tapered so `that a valve seat 16 is provided. This valve seat forms a rest for the e plug 17 which is in threaded engagement ymunicates ywith the interior of the cylinder 18 so that oil can be sucked up into the cyl- Specification of Letters Patent. Patented Dec. 15, 1914,

inder 18 ,when the piston is making its upk stroke. A valve 21 has its stem22 slidably connected with the yoke23 and' is held in n the position yshown in Fig. 1 so that it lmay be raised upwardlyto permit they oil toflow into they cylinder 1 8 and then drop back upon its seat, thus preventing the oil from flowing back into the pipe 15. A head 211 is threaded into the'upper end portion of the inner cylinder 18 and is kprovidedwith pivot ears 25 with which the pawls 26 are pivotally connected. 'These pawls are engaged by the springs 27 and are normally held in such a position so that their upper as the piston is moved, thus causing the oily to be sucked into the inner cylinder 18.k [A

valve disk 33 is mounted above the piston head yas shown in Fig. land is intendedl to close the openings 34 when the piston is moving upwardly. There is suilicient space between the upper faceoithe valve 33 and the flangeof the collar 3'so that when the piston moves downwardly the disk `fcan move awayk from thepiston head and permit the oil to flow through the piston head. A tapered sleeve 35is mounted upon the piston rod above the collar so that when the pump rod is drawn kupwardly a certain amount the sleeve will engage the lower ends of theopawls 26 and move these pawls against the tension of the springs 27. This will release the inner cylinder and permit the inner cylinder to be withdrawn fromv the outer cylinder when the pump rod is withdrawn from the well.

The operation of this devicev is as follows The inner cylinder is lowered into i forced through the well together with the pump rod and when it reaches the outer cylinder 11 the plug 20 will rest upon the valve seat 16.A and the pawls 26 will engage the teeth 13, thus securely holding the inner cylinder in place. As the pump rod is moved upwardly oil will be sucked into the Vinner cylinder past the valve 2l until the piston head has reached its highest ypoint of travel. "lhe pump rod will then move downwardly and since the valve 2l will close, the oil will be d-- the openings 3d past the valve 30 and into the upper portion of the inner cylinder. llpon the second upward stroke the oil inthe upper portion of the cylinder will be forced into the tube lO as more oil is sucked into the lower portion of the cylinder 18 and will finally be forced out of the upper end ot' thetube l0 as the pumping is continued. i

Having thus described the invention what is claimed as new, is

l. A pump comprising a tube, an outer cylinder, a collar connecting said tube and outer cylinder and provided with internal teeth, a'collar at the lower end of said cylinder forming a valve seat, an inner cylinder positioned within said outer cylinder, a head carried by said inner cylinder, pawls pivotally connected with said head and normally engaging the teeth of said first mentioned collar, a` hollow plug at the lower end of Vsaid inner cylinder resting upon the valve seat of said lower collar, an inwardly opening valve controlling the passage of fluid through the hollow plug into said inner cylinder, a pump rod extending through said head 'into said inner cylinder, a piston head at the inner end of said pump rod provided with openings permittingfluid in said inner cylinder to pass into said piston head into the upper portion of the inner cylinder, an upwardly opening valve normally closing the openings formed in said piston head, and a tapered Collar carried by said pump rod above said last mentioned valve and adapted to engage said pawls whereby said pawls may be swung out of engagement with the teeth of said first mentioned collar when said pump rod matinee is v.drawn upwardly to withdraw said inner cylinder from said outer cylinder.

2. A pump including an outer cylinder, a collar at the upper end of said outerv cylinder provided with internal teeth, a' collar at the lower end of said outer cylinder forming aV valve seat, an inner cylinder, a head ;ing the opening formed in said plug, a pump rod extending into said inner cylinder, a hollow piston carried by said pump roc., an upwardly opening valve controlling the passage of liquid through said piston, and

means carried'by said pump rod for engaging said lpawls to throw the same out oi engagement with the teeth of said upper collar. j

3. A pump including an outer cylinder, a collar carried by said outer cylinder and provided with internal teeth, a lower collar carried by said outer cylinder and provided with an internal valve seat, an inner cylinder, a hollow valve control plug at the lower end of said inner cylinder resting upon the valve seat of said lower collar, a hollow head at the upper end of said inner cylinder, pawls carried by said head and engaging the teeth of said upper collar, a pumpl rod extending into said cylinder, a valve control hollow piston head carried by said pump rod within said inner cylinder whereby fluid may be sucked into said cylinder past the valve of said plug and forced through said hollow piston head into the upper portion of said inner cylinder, and means carried by said pump rod for engaging saidpawls to lock the same out of engagement with said teeth.

ln testimony whereof l hereunto affix my signature in presence of two witnesses.

ARTHUR LEE LIGON.

`Witnessesz R. DUBMLL,

D. B. JACKSON.

Copies of this patent may be obtained for five cents each, by addressing the fCommissioner of Eatents,

Washington, D. C. 

